Barry Moore at 74% in Alabama Senate Primary Despite 40% Undecided

40% of Alabama Voters Still Undecided, So Why Are Markets Pricing Barry Moore Like a Lock?

Two days before Alabama's May 19 Republican Senate primary, four out of every ten likely voters still haven't picked a candidate. An exclusive WBRC/Alabama Daily News survey of 500 likely Republican primary voters found U.S. Rep. Barry Moore leading the field at just 23%, with businessman Jared Hudson at 19% and Attorney General Steve Marshall at 14%. That leaves roughly 44% of the electorate either undecided or scattered among minor candidates. On the ground, this race looks like a coin flip with a slight lean. On prediction markets, it looks almost settled.

Moore currently trades at 74% implied probability on Polymarket and 75% on Kalshi, up from 66% just three days ago. That 9 percentage point surge represents a swift repricing of a race that, by polling standards, remains deeply uncertain. A 74% probability is the kind of confidence markets typically assign to candidates who hold double-digit polling leads with high name recognition and locked-in bases. Moore has none of those things. His 23% polling lead translates to a 4-point edge over Hudson, well within the survey's ±4.38-point margin of error. The central question is whether prediction markets are synthesizing information that polls can't capture, or whether they are extrapolating a trajectory that election day may not confirm.

What Pushed Barry Moore to 74%? The News Events Driving His Alabama Senate Surge

The gap between Moore's 23% polling number and his 74% market price isn't random. It reflects a series of structural advantages that prediction traders are weighting more heavily than raw vote-intention surveys.

The most consequential catalyst was President Donald Trump's January endorsement, which Moore's campaign immediately weaponized into a six-figure television ad buy across the state. In a Republican primary in Alabama, a Trump endorsement functions less like a traditional nod and more like a structural floor under a candidate's support. Senate Majority Leader John Thune and NRSC Chairman Tim Scott followed with their own endorsements in March, signaling to donors and party operatives that Washington's Republican establishment had consolidated behind Moore.

Money followed the endorsements. Moore's campaign outraised and outspent Steve Marshall in Q1 2026, pouring approximately $4.7 million into advertising. That figure represents roughly 91% of all GOP primary television ad spending in the race. In a primary where 40% of voters remain undecided, the candidate dominating the airwaves has a disproportionate opportunity to capture late-breaking voters. Consolidation on the candidate side reinforced the spending advantage: Morgan Murphy exited the race in March and endorsed Moore, narrowing the field and directing conservative voters toward Moore's column.

Markets are pricing all of this as a compounding advantage. Trump endorsement plus institutional backing plus dominant ad spending plus field consolidation equals, in the prediction market's calculus, a candidate who wins close races even when polls look tight. The WBRC survey's "leaners" data supports this logic: when undecided voters were pushed to indicate a preference, Moore's number jumped from 23% to 36%, with Marshall and Hudson tied at 25%.

The Case Against 74%: Why Barry Moore's Market Price May Be Too High

The strongest argument against Moore's current pricing is arithmetic. In a three-way race where Moore polls at 23%, Hudson at 19%, and Marshall at 14%, the remaining 40% of undecided voters don't need to break evenly against Moore for him to lose. They just need to break unevenly toward one alternative. If Alabama's primary were a two-candidate race, the Trump endorsement and spending dominance would make 74% look conservative. But it's not a two-candidate race.

Jared Hudson, a former U.S. Navy SEAL, leads Moore in northern and central Alabama, including the Huntsville and Birmingham media markets. Those are the state's fastest-growing population centers and the regions where Trump's endorsement carries less automatic weight relative to the rural south. If Hudson's geographic base turns out at high rates, Moore's statewide lead could evaporate. Steve Marshall, meanwhile, carries the built-in name recognition of a sitting Attorney General, an advantage that tends to matter most among low-information voters who decide in the final 48 hours.

The poll's margin of error of ±4.38 points means Moore's lead over Hudson could be as narrow as zero or as wide as eight. A market at 74% is implicitly saying that even in the worst plausible polling scenario, Moore's structural advantages (money, endorsements, leaners) carry him through. That's a defensible thesis, but it leaves almost no room for a Hudson surge or a Marshall consolidation play. If the undecided 40% breaks 2-to-1 for a single challenger, Moore could find himself in a runoff rather than winning outright.

Barry Moore's Prediction Market Trajectory Into the Alabama Primary

Moore's market price bottomed at 60% during the period tracked, a level that more closely matched the ambiguity in public polling. The subsequent 14 percentage point climb to 74% coincided with the final stretch of campaign advertising and the publication of the WBRC/Alabama Daily News survey showing Moore's lead among "leaners" expanding to 11 points over his nearest rivals. The 3-day acceleration from 66% to 74% suggests a wave of positioning by traders who believe late-deciding voters will default to the candidate with the most visible campaign infrastructure.

The tight spread between Kalshi (75%) and Polymarket (74%) indicates that the pricing consensus is firm across platforms. When two independent prediction markets agree within a percentage point, it typically means the available information has been fully absorbed. Any further move before Tuesday's resolution will likely require new polling data or a last-minute endorsement shift.

For traders evaluating this market, the core bet is straightforward. At 74%, you are paying $0.74 for a contract that pays $1.00 if Moore wins, a return of roughly 35% if he does. The implied 26% chance of Moore losing prices in the possibility that undecided voters consolidate behind Hudson or Marshall, but it assigns that scenario less than a one-in-three chance of occurring. Whether that's a fair price depends entirely on how you weight Trump's endorsement machine against a 40% undecided electorate in the final 48 hours of a volatile primary.